Though one should have dreams, it's not realistic to exist on dreams.

尽管人应该有梦想，但是依靠梦想生活也不现实。

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Now,LCROSS has shown that large amounts of water could exist on the moon.

VOA: special.2009.12.30

And so there are only two kinds of waves that can exist on this violin string, standing or traveling.

由于这只有两种波,可以存在在这条弦上，驻波或行波。

麻省理工公开课 - 固态化学导论课程节选

I don't even exist on Wednesday I died myself on Tuesday ? How can I kill him after I'm dead?

我星期三压根就不存在了,我星期二就死了,我怎么可能在我死了之后杀了他？

耶鲁公开课 - 死亡课程节选

Cloud computing takes existing physical servers and creates virtualized servers to exist on top of them.

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They wear blinders to what is going on around them, and exist on auto-pilot.

FORBES: 11 Modest Tips for Staying Middle Class (Awaiting Obama)

These grainy photographs may be the first evidence that liquid water can exist on Mars.

ECONOMIST: Water on Mars